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<pre><span class="comment"> /****************************************************************************
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 #include &lt;QtGui&gt;

 #include &quot;screenshot.h&quot;

 Screenshot::Screenshot()
 {
     screenshotLabel = new QLabel;
     screenshotLabel-&gt;setSizePolicy(QSizePolicy::Expanding,
                                    QSizePolicy::Expanding);
     screenshotLabel-&gt;setAlignment(Qt::AlignCenter);
     screenshotLabel-&gt;setMinimumSize(240, 160);

     createOptionsGroupBox();
     createButtonsLayout();

     mainLayout = new QVBoxLayout;
     mainLayout-&gt;addWidget(screenshotLabel);
     mainLayout-&gt;addWidget(optionsGroupBox);
     mainLayout-&gt;addLayout(buttonsLayout);
     setLayout(mainLayout);

     shootScreen();
     delaySpinBox-&gt;setValue(5);

     setWindowTitle(tr(&quot;Screenshot&quot;));
     resize(300, 200);
 }

 void Screenshot::resizeEvent(QResizeEvent * <span class="comment">/* event */</span>)
 {
     QSize scaledSize = originalPixmap.size();
     scaledSize.scale(screenshotLabel-&gt;size(), Qt::KeepAspectRatio);
     if (!screenshotLabel-&gt;pixmap()
             || scaledSize != screenshotLabel-&gt;pixmap()-&gt;size())
         updateScreenshotLabel();
 }

 void Screenshot::newScreenshot()
 {
     if (hideThisWindowCheckBox-&gt;isChecked())
         hide();
     newScreenshotButton-&gt;setDisabled(true);

     QTimer::singleShot(delaySpinBox-&gt;value() * 1000, this, SLOT(shootScreen()));
 }

 void Screenshot::saveScreenshot()
 {
     QString format = &quot;png&quot;;
     QString initialPath = QDir::currentPath() + tr(&quot;/untitled.&quot;) + format;

     QString fileName = QFileDialog::getSaveFileName(this, tr(&quot;Save As&quot;),
                                initialPath,
                                tr(&quot;%1 Files (*.%2);;All Files (*)&quot;)
                                .arg(format.toUpper())
                                .arg(format));
     if (!fileName.isEmpty())
         originalPixmap.save(fileName, format.toAscii());
 }

 void Screenshot::shootScreen()
 {
     if (delaySpinBox-&gt;value() != 0)
         qApp-&gt;beep();
     originalPixmap = QPixmap::grabWindow(QApplication::desktop()-&gt;winId());
     updateScreenshotLabel();

     newScreenshotButton-&gt;setDisabled(false);
     if (hideThisWindowCheckBox-&gt;isChecked())
         show();
 }

 void Screenshot::updateCheckBox()
 {
     if (delaySpinBox-&gt;value() == 0)
         hideThisWindowCheckBox-&gt;setDisabled(true);
     else
         hideThisWindowCheckBox-&gt;setDisabled(false);
 }

 void Screenshot::createOptionsGroupBox()
 {
     optionsGroupBox = new QGroupBox(tr(&quot;Options&quot;));

     delaySpinBox = new QSpinBox;
     delaySpinBox-&gt;setSuffix(tr(&quot; s&quot;));
     delaySpinBox-&gt;setMaximum(60);
     connect(delaySpinBox, SIGNAL(valueChanged(int)), this, SLOT(updateCheckBox()));

     delaySpinBoxLabel = new QLabel(tr(&quot;Screenshot Delay:&quot;));

     hideThisWindowCheckBox = new QCheckBox(tr(&quot;Hide This Window&quot;));

     optionsGroupBoxLayout = new QGridLayout;
     optionsGroupBoxLayout-&gt;addWidget(delaySpinBoxLabel, 0, 0);
     optionsGroupBoxLayout-&gt;addWidget(delaySpinBox, 0, 1);
     optionsGroupBoxLayout-&gt;addWidget(hideThisWindowCheckBox, 1, 0, 1, 2);
     optionsGroupBox-&gt;setLayout(optionsGroupBoxLayout);
 }

 void Screenshot::createButtonsLayout()
 {
     newScreenshotButton = createButton(tr(&quot;New Screenshot&quot;),
                                        this, SLOT(newScreenshot()));

     saveScreenshotButton = createButton(tr(&quot;Save Screenshot&quot;),
                                         this, SLOT(saveScreenshot()));

     quitScreenshotButton = createButton(tr(&quot;Quit&quot;), this, SLOT(close()));

     buttonsLayout = new QHBoxLayout;
     buttonsLayout-&gt;addStretch();
     buttonsLayout-&gt;addWidget(newScreenshotButton);
     buttonsLayout-&gt;addWidget(saveScreenshotButton);
     buttonsLayout-&gt;addWidget(quitScreenshotButton);
 }

 QPushButton *Screenshot::createButton(const QString &amp;text, QWidget *receiver,
                                       const char *member)
 {
     QPushButton *button = new QPushButton(text);
     button-&gt;connect(button, SIGNAL(clicked()), receiver, member);
     return button;
 }

 void Screenshot::updateScreenshotLabel()
 {
     screenshotLabel-&gt;setPixmap(originalPixmap.scaled(screenshotLabel-&gt;size(),
                                                      Qt::KeepAspectRatio,
                                                      Qt::SmoothTransformation));
 }</pre>
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